Latch-bolt lock.



w. H. EISBN HART.

LA'I'GH BOLT LOCK. APPLICATION TILED D110. 22, 1910.

Patented J an. 9, 1912.

WILLIAM H. EISENHART, OF YORK, PENNSYLVANIA.

LATCH-BOLT LOCK.

Specification of Letters Patent.

Patented Jan. 9,1912.

Application filed December 22, 1910. Serial No. 598,728.

vThe object of the invention resides in the provision of a latch boltlock which may be applied to various forms of locksand latch bolts nowin use and which includes a single .means whereby the device may besecured in unlocked position against accidental movement to lockedposition, and in locked position so as to prevent the same from beingoperated to unlocked position except from the inside of the door.

A further object of the invention resides in the provision of a deviceof the character named which will be simple in construction, durable,and efficient in use, and which may be manufactured at an exceedinglysmall cost.

With these and other objects in view, the invention consists in thedetails of construction and the arrangement and combination of parts tobe hereinafter more fully described and particularly pointed out in theappended claims.

In describing the invention in detail, reference will be had to theaccompanying drawings, wherein like characters of reference denotecorresponding parts in the several views; and in which,

Figure l is an edge view of a fragment of a door with the inventionapplied, showing the locking lever disposed and secured in lookingposltion; Fig. 2, a view similar to Fig. 1 with the locking leverdisposed and secured in unlocked position; Fig. 3, a view looking at theinside of a door with the parts of the invention in the position shownin Fig. 1; Fig. 4, a view similar to Fig. 3, with the parts in theposition shown in Fig. 2; Fig. 5, a detail perspective view of thelocking lever; and Fig. 6, a detail perspective view of the securing armwhich cooperates with the locking lever.

Referring to the drawings, 10 indicates the door and 11 the latch bolt,which latter the movement of said arm into the recess 12. serving tosecure the latch bolt against operation, while the movement thereof outof said recess will permit the free operation of the latch bolt. Theouter end of the arm 14 is bent, as at 15, so as to extend transverselyof therdoor 10 and lie in spaced relation thereto for a purpose thatwill presently appear. Extending from the upper end of thelever A on thesame side as the arm 14 is another arm 16, the outer end of which isbent so as to be disposed transversely ot the door '10 and in spacedrelation thereto ina manner similar to the bent portion 15 of the arm14. By this construction, it will be apparent that as the lever A isope'r ated so as to move the arm 13 out of the recess 12, the bentportion 15 of the arm 14 will serve to limit such movement of the lever.Mounted on the inner side of the door 10 is an arm C which is steppedadjacent its free end so as to form a shoulder 18. The free end of thisarm C is also provided with a lateral tongue 19 which is bent so as toafford a suitable grip for the manual operation of the arm C.

When the locking lever A is disposed in locking position, as shown inFig. 1 and when the arm'O is moved to a position sub-' stantiallyparallel with the vertical edge of the door 10, the lower edge of thebent portion 17 of the arm 16 will engage the shoulder 18 and therebysecure the lever A against movement to unlocked position. However, tomove said lever to unlocked position, it is only necessary to swing thearm 0 on its pivot and disengage the shoulder from the bent portion 17of the arm 16 and then move the upper end of the lever A toward theinner side of the door, this movement being limited by the engagement ofthe bent portion 15 of the arm 14 with thelower end of thearm C. c Whenthe lever A is in this position, as shown in Fig. 2, the arm 0 is againmoved to a position substantially parallel to the vertical edge of thedoor and the shoulder 18 will lie positioned between the inner face ofthe bent portion 17 of the arm 16 and the inner side of the door andthus prevent the movement of the locln'ng lever A to locking position asthe result of jarring or any accidental causes.

It will thus be seen that there has been provided a single means ofexceedingly simple construction for maintaining the locking lever of thelatch bolt either 1n locked or unlocked position, this dual functionbeing accomplished without altering the relative relation of the partsof the securing means in either instance.

What is claimed is 1. The combination with a door and a latch boltmounted therein having a transverse recess in one face thereof disposedeX- teriorly of the free end of the door when the bolt is in lookingposition, a lever pivoted on the free end of the door, one end of saidlever being movable into and out of the re-- cess in the latch bolt, anda single means movable into and out of the path of travel of the otherend of said lever for holding same against movement when the first namedend thereof is disposed in or out of the recess in the latch bolt.

2.- The combination with a door and a latch bolt mounted therein havinga transverse recess in one face thereof disposed exteriorly of the freeend of the door when the bolt is in looking position, a lever pivoted onthe free end of the door, one end of said lever being movable into andout of I the recess in the latch bolt, and the other end thereof bentacross the inner side of the door in spaced relation to the latter, andan arm pivotally mounted on the door having its free end stepped andforming a resultant shoulder, said shoulder in the active posi-- tion ofthe arm engaging one edge of the bent portion of the lever when thelatter extends into the recess in the latch bolt to hold same againstmovement out of said recess Copies of this patent may be obtained forfive cents each, by addressing the Commissioner oi' ratents,

Washington, D.'G.

